Indoor No Blast Lab Chemical Fume Hood Fireproof With Double Lock

Heat Resistant Fireproof Acid & Alkali Resistant Explosion Proof Laboratory Chemical Fume Hood

1. Product Description 

A fume hood (sometimes called a fume cupboard or fume closet) is a type of local ventilation device that is designed to limit exposure to hazardous or toxic fumes, vapors or dusts.

A fume hood is typically a large piece of equipment enclosing five sides of a work area, the bottom of which is most commonly located at a standing work height.

Two main types exist, ducted and recirculating (ductless). The principle is the same for both types: air is drawn in from the front (open) side of the cabinet, and either expelled outside the building or made safe through filtration and fed back into the room. This is used to:

-protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes)
-protect the product or experiment (biosafety cabinets, glove boxes)
-protect the environment (recirculating fume hoods, certain biosafety cabinets, and any other type when fitted with appropriate filters in the exhaust airstream)

Secondary functions of these devices may include explosion protection, spill containment, and other functions necessary to the work being done within the device.

2. Product Parameters 

3. More About the Fume Hood 

When Fume Hoods Should And Shouldn't Be Used

Though a laboratory is one of the most frequent users of a lab hood, other industries implement their use in production as well, such as forensics and industrial operations.

A fume hood often is the main component that protects workers who are handling flammable or toxic chemicals. Some situations where a fume hood's exhaust system is critical include:

-When working with inhalation hazards, such as chemical vapors, radioactive materials, and toxic gases and powders.
-When procedures may expose workers to substances that could explode or cause a change in pressure.
-When vapors may cause fires.
-When an offensive odor is produced as workers are managing chemical compounds.

Though the above outlines some of the situations where a fume hood should be used, there are some instances when one shouldn't be used.

For example, during a power outage, it is likely the ventilation in a workspace will not function properly. Because a fume hood relies on exhaust fans to remove toxic substances from the area, operating a fume hood during a power outage could pose a danger to workers.

It's also possible that your particular lab might require a specialized design for your fume hood, depending on the chemicals your workers handle. For example, fume hoods can be designed with various surfaces for chemical resistance.

4. Detailed Photos

5. Fume Hood Maintenance

• Hoods should be evaluated by the user before each use to ensure adequate face velocities and the absence of excessive turbulence.

• In case of exhaust system failure while using a hood, shut off all services and accessories and lower the sash completely. Leave the area immediately.

• Fume hoods should be certified, at least annually, to ensure they are operating safely. Typical tests include face velocity measurements, smoke tests and tracer gas containment. Tracer gas containment tests are especially crucial, as studies have shown that face velocity is not a good predictor of fume hood leakage.

• Laboratory fume hoods are one of the most important used and abused hazard control devices. We should understand that the combined use of safety glasses, protective gloves, laboratory smocks, good safety practices, and laboratory fume hoods are very important elements in protecting us from a potentially hazardous exposure.

• Laboratory fume hoods only protect users when they are used properly and are working correctly. A fume hood is designed to protect the user and room occupants from exposure to vapors, aerosols, toxic materials, odorous, and other harmful substances. A secondary purpose is to serve as a protective shield when working with potentially explosive or highly reactive materials. This is accomplished by lowering the hood sash.

6. Project Cases

7. FAQ

6 Questions to Ask When Buying a Fume Hood:

-Which chemicals will you use within the hood?

-Is a ducted or ductless hood best suited to your needs and available space?

-Where will you place the fume hood in the lab? Consider workflows, access to external exhaust systems, and competing air patterns.

-What size fume hood will best suit your needs? Be sure to consider what (if any) equipment will be enclosed in the hood.

-Are any service fixtures or accessories such as airflow monitors, electrical outlets, water, or gas fixtures required?

-Are base cabinets for acid, solvent, or non-chemical storage required?